Approved items ignored when adding to invoice if one item is used in several boards of a project

If one item is used in several boards of a project, and all approved by the client, design files ignores the item approved on the second, third and so on board, when “approved items” selected to add to an invoice. It does not add them up or list them twice, three times etc. This adds a manual step implying to check the boards to add those missing items.